如何在后端使用nodejs + express处理ajax / http-post请求（responsetype：arraybuffer） [英] How to handle ajax/http-post request (responsetype: arraybuffer) using nodejs+express in the backend

问题描述

情况：客户端js向nodejs express服务器发送ajax请求。

Situation : Client js sends ajax request to nodejs express server.

客户端

xmlHttpRequest=new XMLHttpRequest();  
xmlHttpRequest.open("POST","/some/server/path,true);
xmlHttpRequest.responseType="arraybuffer";
xmlHttpRequest.send(new Uint8Array(arraybufferobject));

服务器（到目前为止）

var express = require('express');
var server = express();
server.use(express.static(__dirname));
server.use(express.bodyParser());
server.post('/goforms/modbus/',function(req,res,next){
    //How to access the uint8array || arraybuffer ?
});

server.listen(80);

我在此停留了，如何访问HTTP POST数据？

Im stuck at this point. How to access the HTTP POST data?

推荐答案

bodyParser中间件不解析POST二进制数据。当我尝试使用base64编码的字符串时，它将显示为JSON对象中的对象名称，像{data：}之类的东西，显然希望使用形式为name = value的POST数据。

The bodyParser middleware does not parse POSTed binary data. When i tried base64 encoded strings, it would show up as the object name in a JSON object, something like {"data":}, obviously expecting POST-data in the form name=value.

可能有一个处理二进制d的中间件ata，或者您可以通过绑定到数据事件来访问原始数据，并使用 ProtocolBuffers.js wiki 。

There might be a middleware that deals with binary data, or you can access the raw data by binding to the "data" event and stack the received chunks into a buffer using the method described in the ProtocolBuffers.js wiki.

这是使用没有快递的香草http模块，但应该工作。

This is using the vanilla http module without express, but should work anyway.

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